debian/watch

   1 version=4
   2
   3 opts="\
   4 pgpsigurlmangle=s/$/.asc/,\
   5 uversionmangle=s/(\d)[_.+-]?((beta|alpha)\.?\d*)$/$1~$2/,\
   6 dversionmangle=s/\+dfsg\d*$//,\
   7 repack,\
   8 repacksuffix=+dfsg1,\
   9 compression=xz,\
  10 " \
  11  https://www.rust-lang.org/en-US/other-installers.html \
  12  (?:.*/)rustc?-(\d[\d.]*(?:-[\w.]+)?)-src\.tar\.gz